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Method for preparing polyoxometallate composite mesoporous material by electrostatic spinning

A polyoxometalate and electrospinning technology, which is used in the preparation of spinning solutions, textiles and papermaking, and rayon of inorganic raw materials, etc., to achieve the effects of convenient operation, good repeatability and quick preparation.

Inactive Publication Date: 2012-06-20
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many materials prepared by electrospinning technology, but there is no report on the preparation of polyoxometalate composite mesoporous materials by this method

Method used

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  • Method for preparing polyoxometallate composite mesoporous material by electrostatic spinning
  • Method for preparing polyoxometallate composite mesoporous material by electrostatic spinning
  • Method for preparing polyoxometallate composite mesoporous material by electrostatic spinning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 0.5g of surfactant P123 to 10g of absolute ethanol and stir for 3 hours to fully disperse the surfactant in the solvent; add 0.3g of polyoxometalate H 3 PW 12 o 40 , and continued stirring for 1 hour to form a homogeneous solution. Continue to add 1.5 g of polyvinylpyrrolidone (PVP), and continue to stir for 2 hours until the polymer is completely dissolved. Next, 2 g of tetraethoxysilane (TEOS) was added, stirred for 30 minutes, and then heated and stirred at 110° C. for 1 hour to form a clear colloidal solution.

[0042] Add 10mL of the prepared clear colloidal solution into the liquid storage tube on the nozzle through a pipette, connect the nozzle to the positive electrode of the high-voltage electrostatic generator, and the metal plate covered with aluminum foil on the surface is grounded and used as a collecting plate. The working voltage is 20kv. The distance between the composite nozzle and the collecting plate is 35cm, and the high-voltage electrospinnin...

Embodiment 2

[0045] Add 0.3g of surfactant P123 to 18g of absolute ethanol and stir for 1 hour to fully disperse the surfactant in the solvent; add 0.1g of polyoxometalate H 4 SiW 12 o 40 , and continued to stir for 1.5 hours to form a homogeneous solution. Continue to add 1.9 g of polyvinylpyrrolidone (PVP), and continue stirring for 1 hour until the polymer is completely dissolved. Next, 1.1 g of tetraethoxysilane (TEOS) was added, stirred for 30 minutes, and then heated and stirred at 100° C. for 2 hours to form a clear colloidal solution.

[0046] Add 5mL of the prepared clear colloidal solution into the liquid storage tube on the nozzle through a pipette, connect the nozzle to the positive electrode of the high-voltage electrostatic generator, and the metal plate covered with aluminum foil on the surface is grounded and used as a collecting plate. The working voltage is 25kv. The distance between the composite nozzle and the collecting plate is 28cm, and the high-voltage electrospi...

Embodiment 3

[0049] Add 0.7g of surfactant cetyltrimethylammonium bromide (CTAB) to 14g of methanol and stir for 1.5 hours to fully disperse the surfactant in the solvent; add 0.2g of polyoxometalate Cs 3 PMo 12 o 40 , and continued to stir for 2 hours to form a homogeneous solution. Continue to add 0.9g of polyacrylic acid, and continue to stir for 5 hours until the polymer is completely dissolved. Next, 1.8 g of tetrabutyl titanate was added, stirred for 1 hour, and then heated and stirred at 40° C. for 12 hours to form a pale yellow clear colloidal solution.

[0050] Add 7mL of the prepared clear colloidal solution into the liquid storage tube on the nozzle through a pipette, connect the nozzle to the positive electrode of the high-voltage electrostatic generator, and the metal plate covered with aluminum foil on the surface is grounded and used as a collecting plate. The working voltage is 30kv. The distance between the composite nozzle and the collecting plate is 38cm, and the high...

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Abstract

The invention belongs to the preparation technology of chemical material, and particularly relates to a method for preparing a polyoxometallate composite mesoporous material by electrostatic spinning. The method comprises the following steps of: dissolving a surfactant in a volatile polar organic solvent; adding a polyoxometallate and high polymer material; and with metal / non-metal salt as a mesoporous fiber framework material, preparing the polyoxometallate composite mesoporous material by high-voltage electrostatic spinning equipment. Compared with the traditional method for preparing polyoxometallate composite mesoporous material by hydrothermal synthesis, the method provided by the invention is simple, quick, safe and convenient to operate, and has good repeatability and good generality. A relatively expensive surface functionalization modification reagent is not needed, and the diameter of the composite mesoporous fiber can be effectively controlled by simply regulating the diameter of a nozzle so as to effectively control the external surface area of the material; and the prepared polyacid composite mesoporous fiber can be in any length.

Description

technical field [0001] The invention belongs to the preparation technology of chemical materials, in particular to a method for preparing polyoxometalate composite mesoporous materials by electrospinning. technical background [0002] Mesoporous materials refer to porous materials with a pore size of 2.0-50nm, which have the characteristics of continuously adjustable uniform mesoporous pore size, regular channels, stable skeleton structure, easy-to-modify inner and outer surfaces, and orderly dimensions. A series of mesoporous materials have been synthesized and found to have great potential application value in macromolecular catalysis, adsorption separation, and chemical assembly to prepare advanced functional materials and optical devices. Ordered mesoporous materials have a large specific surface area, relatively large pore size and regular pore structure, which can increase the diffusion rate of reactants and products in catalytic reactions, thus providing an ideal plac...

Claims

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Application Information

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IPC IPC(8): D01F9/08D04H1/4234D04H1/728D01D1/02
Inventor 邢宏珠苏忠民
Owner NORTHEAST NORMAL UNIVERSITY
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